How can we tweak our value proposition ?

Hey everyone! Me and my friends are working on an app that reimagines the walking experience for those who like casually explore the city. As you pass through the streets, the grey buildings automatically turn yellow, mapping the exact buildings you have already seen and showing your progress in the city. We are on the MVP stage, so looking for a group of beta testers who can check the usability of the app, maybe come up with some ideas as current service offering is just a stage 1 and generally give us some feedback. The app is currently working in central London, so if you regularly spend your time in Zone 1, join!:) https://apps.apple.com/gb/app/walkable-discover-london/id6476093462 Thank you!